Mixer Tap & Pump

[StormBarney]

Hello All, I could really do with some advice here on a job.
Installed a whole new bathroom in a dorma bungalow.
Heating is an immersion heater at the back of the house.
Installed a power shower, fed off a pump I installed next to the immersion.
Cold water supply is from the mains.
Power shower works fine, pump kicks in as it should do.

The problem is, the hot water on the mixer tap does not work when turned on.
There is just not enough flow for the pump to kick in through these taps.
I have got rid of the flexi, and put the 15mm copper pipe to mixer, but as you know, it goes into a small hole into the tap, hence the pump not kicking in.
The sink is the smallest one ever, so a mixer tap is the only option..
Any ideas anybody please?

 

[picasso]

You don't have many options concerning the tap, if the tap is so restrictive the pump wont start either change the tap or the system feeding it, as feeding anything with mains and pumped water is a bad idea you should look at putting in an unvented cylinder, or if that isn't an option a negative head pump (properly installed) could get you out of trouble.

 

[StormBarney]

Thanks Picasso...
Does anybody know of a mixer tap with 15mm seperate inlets?
Or any other suggestions?

 

[muggles]

Replace your positive head pump with a Universal / Negative head pump - that'll definitely kick in. Not aware of any bathroom mixers that don't mix internally

 

[Madrab]

Is your tap designed for low pressure or is it a high pressure tap? Sounds like the latter. Changing to LP may sort it out. That being said do you really want pumped hot water if it's a such a small basin? If you loosen the pipe after the iso valve feeding the hot tap and open it, do you get flow? * pump off *

I guess you're looking for a dual flow LP mixer Tap like tis one - http://www.bristan.com/epages/Bristan.sf/AU_en/?ObjectPath=/Shops/Bristan/Products/"VAC DFBAS C NH"